check fan filter safety switch is fan grill/cover fully home is lamphouse door safety switch 'made' try putting slight pressure on lamphouse covermore...
NEC MultiSync LT84 Multimedia Projector - Troubleshooting
error signal of any sort. Thanks for the attention and input. Lamp has little over 500 hours (much lower than the specified lifetime). Made sure the lampcover screws are tight. Maybe I'll give it a try and change more...
NEC MultiSync LT84 Multimedia Projector - Troubleshooting
this is lit red continually, it's warning you that the projection lamp has exceeded 1000 hours of service. After this light appears, it If this light blinks red rapidly, it indicates that the lampcover is not attached properly or the projector is overheated. See the more...
NEC MultiSync LT84 Multimedia Projector - User Guide (page #8)